We ended up deciding to rip out the carpet in our condo and put in wood flooring, because the pet stains were too bad to shampoo out. After a grueling day of packing up our entire living room (no small feat, considering how it contains Jimmy's hundreds of dvds and my entire yarn collection and my computer and desk and work station, not to mention all the mess and clutter), ripping up the carpet and padding, and laying the foam and wood planks down, I left a large inscription on the concrete before it got covered up by the flooring:
Here we will live on, long after we have decided to live elsewhere :)
